Transgene Announces Collaboration with Merck KGaA, Darmstadt, Germany, and Pfizer to Evaluate the Combination of TG4001 with Avelumab in HPV-Positive Head & Neck Cancer in a Phase 1/2 Study

Transgene (Paris:TNG), a company focused on designing and developing
targeted immunotherapies for the treatment of cancer and infectious
diseases, today announced it has entered a collaboration agreement with
the science and technology company Merck KGaA, Darmstadt, Germany, and
Pfizer (NYSE: PFE) under which Transgene will sponsor a Phase 1/2 study
evaluating the potential of the therapeutic vaccine candidate TG4001 in
combination with avelumab, an investigational fully human anti-PD-L1
IgG1 monoclonal antibody, for the treatment of human papilloma virus-
(HPV-) positive head and neck squamous cell carcinoma (HNSCC), after
failure of standard therapy.

Philippe Archinard, Chairman and CEO of Transgene, commented: “We are
pleased to enter this collaboration with Merck KGaA, Darmstadt, Germany,
and Pfizer to evaluate our therapeutic vaccine TG4001 in association
with avelumab. In previous clinical trials, TG4001 has demonstrated
promising activity in terms of HPV viral clearance and was well
tolerated. TG4001 is one of the few drugs targeting HPV-associated
cancers that can be combined with an immune checkpoint blocker such as
avelumab. The preclinical and clinical data that have been generated
with both TG4001 and avelumab individually suggest this combination
could potentially demonstrate a synergistic effect, delivering a step up
in therapy for HPV-positive HNSCC patients.”

The combination of TG4001 and avelumab aims to target two distinct steps
in the immune response to target cancer cells. This is an exclusive
agreement between the parties to study the combination of these two
classes of investigational agents in HPV-positive HNSCC.

Prof. Christophe Le Tourneau, M.D., Head of the Early Phase Program at
Institut Curie, and a world expert in ENT cancers, will be the Principal
Investigator of the Phase 1/2 study. This trial is expected to begin in
France, with the first patient expected to be recruited in H1 2017. It
will seek to recruit patients with recurrent and/or metastatic
virus-positive oropharyngeal squamous cell carcinoma that have
progressed after definitive local treatment or chemotherapy, and cannot
be treated with surgical resection and/or re-irradiation.

Prof. Christophe Le Tourneau said: “HPV-induced head and neck cancers
are currently treated with the same regimen as non-HPV-positive HNSCC
tumors. However, their different etiology clearly suggests that
differentiated treatment approaches are needed for HPV-positive
patients. Immunotherapy, and in particular the therapeutic vaccine
TG4001 together with the PD-L1 blocker avelumab, by targeting two
distinct steps in the immune response, could deliver improved efficacy
for patients who have not responded to or have progressed after a first
line of treatment.”

TG4001 is an active immunotherapeutic designed by Transgene to express
the coding sequences of the E6 & E7 tumor-associated antigens of HPV-16
and the cytokine, IL-2. This therapeutic vaccine, which is based on a
non-propagative, attenuated vaccinia vector (MVA), has already been
administered to more than 300 patients with high grade cervical
intra-epithelial neoplasia (CIN 2/3). It has demonstrated good safety, a
significant HPV clearance rate and promising efficacy results. Its
mechanism of action and good safety profile make TG4001 a particularly
appropriate candidate for combinations with other therapies, such as
avelumab.

Avelumab is an investigational, fully human antibody specific for a
protein found on tumor cells called PD-L1, or programmed death ligand-1.
As a checkpoint inhibitor, avelumab is thought to have a dual mechanism
of action that may potentially enable the immune system to find and
attack cancer cells. By binding to PD-L1, avelumab is thought to prevent
tumor cells from using PD-L1 for protection against white blood cells
such as T-cells, exposing them to anti-tumor responses. Avelumab is also
thought to help white blood cells such as natural killer (NK) cells find
and attack tumors in a process known as ADCC, or antibody-dependent
cell-mediated cytotoxicity. In 2014, the science and technology company
Merck KGaA, Darmstadt, Germany, and Pfizer signed a strategic alliance
to co-develop and co-commercialize avelumab.

Alise Reicin, M.D., Head of Global Clinical Development in the biopharma
business of Merck KGaA, Darmstadt, Germany, which in the US and Canada
operates as EMD Serono, commented: “We believe combination regimens
show significant promise in the development of novel and efficacious
immuno-oncology treatments. Through this study, we hope to discover the
potential of avelumab as a combination therapy with TG4001 for patients
fighting this recurring cancer.”

Chris Boshoff, M.D., Ph.D., Head of Immuno-Oncology, Early Development,
and Translational Oncology at Pfizer, said: “Through this
collaboration, we hope to better understand how therapeutic vaccines may
help support the clinical development program for avelumab as our end
goal is to find the best treatment options for patients.”

About HPV-mediated Head and Neck Cancer

Head and neck squamous cell carcinoma (HNSCC) is a heterogeneous group
of cancers that can affect the oral cavity, pharynx, and larynx. HPV-16
infection is recognized to participate in the development of a
substantial proportion of head and neck cancers and is associated with a
subset of HNSCC, especially those arising from the oropharynx (more than
80%), which are the most frequent, and the larynx (~70%).

The incidence of HPV-16-related head and neck cancer has significantly
increased in recent years. Although there are more than 100 subtypes of
HPV, HPV-16 accounts for 90% of all HPV-related head and neck cancers.
Global spending on head and neck cancer indications amounted to
$1 billion in 2010.

Current treatments include surgical resection with radiotherapy or
chemoradiotherapy. However, better options are needed for advanced and
metastatic HPV+ HNSCC. It is thought that immunotherapy combined with
immune checkpoint inhibitors could provide a promising potential
treatment option that would address this strong medical need.

About TG4001

TG4001 is an investigational therapeutic vaccine based on a
non-propagative, highly attenuated vaccinia vector (MVA), which is
engineered to express HPV-16 antigens (E6 & E7) and an adjuvant (IL-2).
It is one of the few therapies targeting HPV+ sub population. TG4001 is
designed to have a two-pronged antiviral approach: to alert the immune
system specifically to HPV-16-infected cells that have started to
undergo precancerous transformation (cells presenting the HPV-16 E6 and
E7 antigens) and to further stimulate the infection-clearing activity of
the immune system through interleukin 2 (IL-2). TG4001 has been
administered to more than 300 patients, demonstrating good safety,
significant HPV clearance rate and promising efficacy results. Its
mechanism of action and good safety profile make TG4001 an excellent
candidate for combinations with other therapies in solid tumors.

About Avelumab

Avelumab (also known as MSB0010718C) is an investigational, fully human
antibody specific for a protein found on tumor cells called PD-L1, or
programmed death ligand-1. Avelumab is thought to have a dual mechanism
of action which may enable the immune system to find and attack cancer
cells. By binding to PD-L1, avelumab is thought to prevent tumor cells
from using PD-L1 for protection against white blood cells such as
T-cells, exposing them to anti-tumor responses. Avelumab is also thought
to help white blood cells such as natural killer (NK) cells find and
attack tumors in a process known as ADCC, or antibody-dependent
cell-mediated cytotoxicity. In November 2014, Merck KGaA, Darmstadt,
Germany, and Pfizer announced a strategic alliance to co-develop and
co-commercialize avelumab.

About Transgene

Transgene S.A. (Euronext: TNG), part of Institut Mérieux, is a publicly
traded French biopharmaceutical company focused on designing and
developing targeted immunotherapies for the treatment of cancer and
infectious diseases. Transgene’s programs utilize viral vector
technology with the goal of indirectly or directly killing infected or
cancerous cells. The Company’s two lead clinical-stage programs are:
TG4010 for non-small cell lung cancer and Pexa-Vec for liver cancer. The
Company has several other programs in clinical and pre-clinical
development. Transgene is based in Strasbourg, France, and has
additional operations in Lyon, as well as a JV in China with Tasly
Group. Additional information about Transgene is available at www.transgene.fr.

Disclaimer

This press release contains forward-looking statements about the
future development of TG4001. Although the Company believes its
expectations are based on reasonable assumptions, these forward-looking
statements are subject to numerous risks and uncertainties, which could
cause actual results to differ materially from those anticipated. The
occurrence of any of these risks could have a significant negative
outcome for the Company’s activities, perspectives, financial situation,
results and development. The Company’s ability to commercialize its
products depends on but is not limited to the following factors:
positive pre-clinical data may not be predictive of human clinical
results, the success of clinical studies, the ability to obtain
financing and/or partnerships for product development and
commercialization, and marketing approval by government regulatory
authorities. For a discussion of risks and uncertainties which could
cause the Company’s actual results, financial condition, performance or
achievements to differ from those contained in the forward-looking
statements, please refer to the Risk Factors (“Facteurs de Risque”)
section of the Document de Référence, which is available on the AMF
website (http://www.amf-france.org)
or on Transgene’s website (www.transgene.fr).

PharmiWeb.com is Europe's leading industry-sponsored portal for the Pharmaceutical sector, providing the latest jobs, news, features and events listings.
The information provided on PharmiWeb.com is designed to support, not replace, the relationship that exists between a patient/site visitor and his/her
physician.